Automatic recording-scale.



E. MoGARVEY. AUTOMATIC nnconnme scALE.

APPLIOATIOH IILED OUT. 3, 1911. I

Patented Aug. 5, 1913 m Q m mm m %N m v 4 km 1 N n mm a a 0 am 7 w 9 6 w I INVENTORp fiat/vow WITNESSES;

APPLICATION FILED OUT. 3, 1911.

Patented Au .5, 1913.

3 SHEETS-SHEET 2.

I WITNESSES.

E. MOG RVBY. AUTOMATIG REGGRDING SCALE. APPLIGATIU H FILED 00123, 1911.

' Patented Aug. 5, 1913.,

3 SHEETS-SHEET 3.

wamzssas: INVENTOR r, a2? M f"? I mm! W w W nmticaiiy haiuncing the-scale" Serial N0. 652331.

tact tieyinas fer bringing the beam 1103 condition 0f, Test, improveci magnetii: clutch, tiiggther ii igh. othw featurias of.- improved cnnstmici-imi as. will be: more iully hei'einaim-i deseriheiii.

Generally stated, the appui'a-tus:aomprises;-

in cumbinationwith the pspisa beam. elem illustrating Ran enlarged mechav csz izacs fliemagmatic clutch. Fig.j'-fi View, 1;; ehivzibion, iii-the tr nism for making andbm for mmmi. 1 the mater. 551 ,7 is vial? OfSfl'iLi iii ahanismin side elevm'zian. 8 a partial diagrammatic View, simiiaac to Fig 6, v.shcrwing;,the miiiamaiic: ievevcom tmiiei'lbalancing device for bringing the paise heam to rest Fi 9 is a, diagram of themviring circuit and wntac-"n mechzmisiii. Figs. 10 and 1.1 are simiim. part/iii diagrams afn zhe trig 1016; 09mm: iiiechmiism indii? fawn-it pqi'sitiomh In the drawings, 2 is. the urinal. balancing haam of a .sciiie meun'ie by knife edge hear in any suitable suppoiit, as-bezir-ingsA extening upwardly from the base of the scale fmm-e. The beam Qis in the form of-a. rectmiguim' frame. having two oppositeiy axraziged side bars joined at, their ends by Crossbars; 5 (and 6, of any suitable constructivn iiie, endinostbzir. 5 providing a'vbeaning for ihe outer end (if the poiseifqzed screw and fairmounting of the; terminah mevable ceniacii member, the innar and 6 M50 p 'ovid-.

ing a bearing for the motor shaft 7 is ihe; adjustable pois s mau-nted by-sup1 perting wheel s 8 abezwh side of suppmtingtracks 9 arranged in gxtu: new-11y, at? the ances ace and havin' intevfittin e a e men withithe screw by suitablenuhdevices 10. Ti'lSQw-Dliilf eng igg thedhreads ofv-the fazed. screw, 11 by any suiiabie means, as a,

in veiihan direcigiam the -p9ise 7 is located at thQJrPLFDPQ/F.pQilt1m-'Q11 the beam t0 balance it, in the same-manner generally as is the QBdiIli-LTY poisaof the usual Weighing scale (was is the p ise of recording scaie. of this typ a.

Themashin isdesigned.- m operate auto Imiticaiiy $0 thziis-thei-poise will befiocated-at the progenpQSihiDi'l depending upon the Whig-1?: of flier. gqwdsi 0 article being weighaci, :so-as taming-the poise beam to a eonditioii; 055 regt in the. shmztest possible time;

Foni-he npuzpasa 0i actuating-the screw 11 imo'ma- {iiZfiGiI-ififi; orrha other to impart for Ward arebaskwardtmveini the p0ise,-I proniaei a iiiahar M, the-iixmature of which and 11901 5113 of the XILQtOP rotate. in the. usual- Way between thai-fiaids of the. mew", Shaft PENNSJ'LJ'ANIA, AS3JIGNGB"TU INTERNA- AJi-FfliiTE, PENNLYEV-ALEHA, A CBRPORATION' 13 is p 'ovided at its cuter and with arbaa r" ingterminalmauntadin any. suitable iubri sated bearing in tha. outer 0f the beam, and is sampled at its inner enC i wlth' the magnet, generally ,dfisignated :by thenu- 1116.!{11 1 i The machine 18 provided Wlth=pflnt1ng mechanism, indicated generally by the 1et+-, fie-2P, whlchdt is; not necessary herein cm specifically describe, except-to state that it screwm the carbon contact 34:, and in the consists of a series of printing wheels. adapted to be properly positioned in conformity with the action of the feed screw 11, to print the characters indicating the Weight in connection with a paper strip and ribbon, after the beam has come to equipoise, actuated through suitable mechanism P controlled by a branch circuit and switch, and included more specifically in the companion applica time above referred to. It is also somewhat similar to the printing mechanism of my vprior Patent No. 701757.

Inasmuch as the present invention refers particularly to the clutch mechanism, hereinafter described and to the trig loop contact mechanism and balance lever for bringing the beam to a condition of rest, these features will now be described. The contact. mechanism, illustrated in detail in Figs. 6, 7 and 8, and in diagrams, Figs. 59, 10 and 11, is designed to provide an extremely sensitive, light and readily operative means for establishing electrical connection between the line wire at one side of the main supply circuit and the fields of the motor in one position, as when the outer end of the beam 2 is elevated, and between the same line wire and the fields of the motor in a reversed position of the beam, as when lowered, but with changed polarity or in reverse. It is also designed to provide a very sensitive me chanical balancing mechanism for quickly bringing the beam to a condition of rest, after the poise has assumed its final position of rest. The outer end of the beam extends into a clearance space 16 arranged ccntrally of an upwardly extending standard or housing 17 mounted upon the supporting base of the machine, in which space the end of the beam has a limited range of movement as controlled by adjustable set screws 18, i9. Either directly on the end of J is beam, or upon a depending extension 2 thereof, is a bracket 20 carrying vertical pins 21, :21, on which is slidably mounted the bloclg22 having a limited range of vertical travel on pins Pivotally mounted, by stud 23 on said block is an insulating bar :26, in the out-er terminals of which are fixedly secured the carbon conductors 24, respectiwel Saidconductors extend through the ends of bar 526 projecting above and below, as shown, g oviding continuous contacting conductors, and are fixedly secured in place by screws or binding posts 29 to which are also connected the terminals of the conducting wires il, 4-2, leading to the armature m of the motor M. Below the beam terminal and its pivoted contacting bar 26 is located an insulating bracket or block 3 1, secured upon the face of the housing frame 17, upon which are mounted insulated brackets 32,'in one which, is secured by a binding post or other of which, by a similar set screw 33, is secured a similar carbon contact '35. Said contacts 3% and 35 are stationary, but adjustable as to their height for compensation of Wear, etc, Above the pivoted bar 26 are brackets 36, one at each side, carrying vertical pins or studs 37, 37, upon which is slldingly mounted the insulating bar 27, in the outer ends of which are secured by set screw s or binding posts 38, 38. Carbons and 39 are connected, by a branch connection 30 and conductor 30 with one side 13 of the main circuit and contacts 40 and 34- are connected by branch connection 30 and conductor 30 with the motor fields F. The set screws 18, 19, having been adjusted to pr0- vide for the desired or necessary range of movement of the outer end of beam 2-, and the beam being actuated by the weighing operation, makes contact, by upward travel of its outer end by carbons 24, 25, with carbons i0, 39 (see Fig. 10). Circuit is then established from the main line conductor 13, branch 30, terminal 39 to '25, conductor 42 to armature m and by conductor 41, terminal to terminal 40, branch 30 and conductor 3O to the fields F of the motor M and thence through conductor 43, clutch 15, and con ductor 44 to the other main conductor A.

Operation of the motor in the proper direction or as controlled by the thread of the screw 11, Will then shift, the poise? outwardly along the beam slightly beyond the point of equipoisc, tilting the beam downwardly, breaking the circuit and establishing a circuit of reverse polarity, bringing the contacts 2 1-, against lower contacts 35 I and 3% respectively. T he reverse circuitis then established from main line conductor l5, wire 30, contacts 35 and as and conductor all to the armature m of the motor, and from thence through. conductor 42, contacts 25, 3d, conductor 30 to the field F of the motor, and thence by conductor 43 to clutch 15 and conductor 44. to the other sideA of the main circuit. Reverse movement of the screw 11 then shifts the poise Y backwardly, operat ing to separate the contacts 9/1, 25, and 35, 34%, on upward movement of the beam, the operation continuing until the beam has reached a position of rest and the poise is in proper weighing position. For the purpose of assisting the beam in quickly a position oi'rest, as in the case of a top heavy beam, the pivoted bar 26 is designed to operate as a lever bearing by its opposite terminal contact members against the diago nally located contacts 40 and 392, respectively (see Fig. 11). plished through a counter-weighted lever 44, fixedly secured in the central portion of bar 26 by a set screw as, said lever depending downwardly below the bar and being abruptly bent to one side and provided with.

an adjustable counterweight 4.6 having a sociiring set sorow 47. Too xnonniin oi. no box 26 by its pivotal s11 ppoi't 23 on block 22, and tho mounting of said biooi; on dis v z?- ticoi stems 21 i'endei's tho action of the beam forv easy 2115i sensitive.

While its action in. no' Way retards or interferes with the free reciprocation of the and of the beam, for establishing the contoo-is above described in either raised or low ered position, its leveraction as tilted by tho counterweight i6, quickiy affects the highly sensitive beam iei'niinai to cause it to assume an intermediate position, and to quickly separate the current estabiisiiing terminals. It will be soon that in the posi tion'of the iever when tilted, .oon iacts direction when the EllOi'rOl' i;

25, 34, and 4:0, 524;, are brought oogofiier, lim, without closing the opoi'ative cu cuii with.

the main conductor B, so that the action is simply mechanical. The special iidvaniago of this latter feature is in its time oi'iiciency in quickly counteracting any ovei'sonsitive action oi tho boom, and without inany way impairing the eiiioisnoy oi ilie 'electrionl con-- tact iiieoiimiism. Aiso, that the pins 21 and 37 provide fox 'fi'eo sliding of the mounting of bar 26 and bar 527, compensating for any Wear or inoqimiii in balance these parts. In this respect the contact carriers 26 and 27 are flowing e. iiiey are capable of considerable movement on their mountings adapiing them to fiii jfiiilriiiC oclj us znieni. it is designed iiisi Lo sci'ow shaftslmli bs subjeoifi to niognoiic biota-ii engagement witi magnet- 15, for which purpose it-is pi'ovicloii' with a disk 16 securezi to the inner and of the threaded shaft 1L whereby said slmi't is rotatably coo iilie magnet and motor shaft and W1 "f Wiili i i in either operated in one (liiIuCfiiOll 01" tho other. 4 1

The consti'uciion oi": tho magnetic sin is shown in detail in Figs. 3, i and designed to provide, by the magnetic oii n, a coupling connection iit wooii tiic mot-oi ii. and the poise screw 11 Whiciisiiali be sutificiently flexible in its operation to allow short'periocl of time to elapse ofier a con-- tact-is mode iii the outer end of the boom, eitliennp ondown, before the screw begins to tum. This slight delay or dis conning. of the operation is desirable in intei-posi o slight deli}; in imparting rotation :30 ilie screw, siier the begun T thereby nliow for the inertia 'of boom.

Also, by ,IQHSOI} of momentum of illio moior the lIiZlgDLlC-(Liiitfill is of advantage in that immediateuncoupling of the motor M'aml shaifi 11 is oii'ected, ilie facjtoi's of small inertia and high friction of the shaft avoiding any tendency to i'otnioufier tho one: Q's-so, by its 'imb'onci" connection is broken,

n' cured 'to the motor sin] zsfset sorow oi: key. The and of screw shaft 1 iZ-IOtflilfifi freoly inio ilie hub of the field ml is provided with o fixedly soourocl disk 6 sinted, whiie'oln il'i'l'liiilule disk 01 is mounted for partial rotation upon an inwui'diy extending reduced hub Disk 1% is proviilod with oi the disk 16.

o shaped clearance opening looiweon ilie zinnuloi-iy spaced'slioiiltiei's or abut-mom's 16", 16, while a pin 13f is so. cured to armature ring 16 and. extends into said opening. Upon the field being energized by closing of the cii'oiiii; through connoc-' iiio'ns 4:3, 44, the magnetized field Will XO- isle in the desired direction, and pin 16 will move annnlaily through the segmental spade Until it comes into Contact with one of tlie shouiclors iii, whereupon motion. will be tiilIlSHliiiBdi-O shaft; 11. The losi motion 01 the pin l8 thus accomplishes the retarciw tion and desired delay innctuation of the poise. l 1

What I claim is:

1. in a s o, the COHlbiZUliiOll with spaced COIliEiCi iLQIilQiiliLiS and circuit connections thereto, of o sm le boon having ii flexibly mounted siiiiing Contact oai- 'ioi' having (3011-, mots adopted to engage said. terminals.

2. Ina soalo, the combination with spaced Contact fiei'ininols and circuit connections thereto, of seals having o pivoted siicling bar provided with contacts adopted to engage said terminals; v

3. in a scale, the combination with spaced Contact terminals and circuit connections thereto, of a. scaio beam lowing a siidzibly mounted block, and a carrier pivoted thoroon provided with contacts adapted to on; gage said terminals.

4. in a scale, the combination with spacei Contact terminals and circuit 'iionnections thereto, of scale beam having a flexibly mouniod sliding'eontac b carrier having rigid contacts adopted to engage said terminals.-

In a soak, the combination with pairs of spaced ooni'c'ocb, terminals andi oiicuii connections iiiereto, one pair of said contact terminals, being vevticaliy movable, of :2 scale boom having a slidobiy mounted pivoted zigid contact member adapted to ensaiclioriiiinais. 7

- (L in a scale, the combination with ocliy secured pnii." and. iiloossiy mounted pair of Contact iei'min and circuit connections tlioi'eiio, of a; vibi-ii n5 Beam having-zit its and. pivotal y mounted bat providd with contaois oiiapiaeci to said terminals, in sciio, tiio combination with eailyseoiir con-tool; iei'ininais and circuit conneci'ions thereto, of avibrating beam 125 having at its end a siidobly mounted. bioclz' mini a bar piyotaiiy' mounted thereon having contacts adapted to engage terminals.

Sgiln o sci lo, the combination with 3 pair of fixedly secured lower conflict terminals "5.33

and a pair of vertically movable upper contact terminals, and circuit connections thereto, of a vibrating beam having at its end a pivotally mounted bar provided with contacts adapted to engage said terminals.

9. In a scale, the combination of an spec tured housing provided with limiting set screws, a beam extending into the range of said set screws, pairs of lower and upper contact terminals mounted on said housing, a pivoted contact carrier on the beam having contact terminals, and circuit connections for said several terminals.

10. in a scale, the combination of an aper tured housing provided with limiting set screws, a beam extending into the range of said set screws, pairs of lower and upper contact terminals mounted on said housing, a bracket and pins secured to the end of the beam, a slidable block carried thereby, a contact carrier having conducting termmals pivoted. on said slidable block, and circuit connections for said several terminals.

11. in a scale, the combination, with, pairs of lower and upper contact terminals, of a pivoted beam, and a counterweightedcontact bar pivotally mounted on the beam intermediate said terminals adapted to make contact with said terminals opposite ends and to operate an equalizing lever.

12. in a scale, the combination with pairs of lower and upper cont-act terminals, of a pivoted beam, and a contact bar pivotally mounted on the beam intermediate said terminals, operable to make contact said terminals by its opposite ends, and having a tilting lever arm, disposed toward one side of the pivotal mounting of the contact bar.

11 5. in a scale, the combination with pairs of lower and upper contact terminals; of a vibrating beam, and a pivotally mounted contact bar intermediate said terminals having a tilting counter-weighted lever arm.

1%. in a scale, the combination with the fccd screw and the motor, of a rotatable magnetic clutch secured to the motor shaft, 21 shouldered disk secured to thefeed screw, and an. armature for the magnetic clutch having an almtincnt extending between the shoulders of said disk, substantia ly as set forth.

15. in a scale, the combination with the feed screw and the motor, oi? a rotatable magnetic clutcli' secured to the motor shaft, :1 shouldered disk secured to the feed screw having a segmental opening and limiting shoulders, and an armature located between said disk and the magnet provided with a pin projecting into the path oi said shoulders, substantially as sci forth.

16. in a scale, the combination with the feed screw and the motor, oil a rotatable magnetic clutch secured to the motor a shouldered disk secured to the feed screw operatively geared to the poise,

with I poise, a feed screw,

having a segmental opening and vlimiting shoulders, and an armature located between said disk and the magnet provided with a pin projecting into the path of said shoulders, said disk having a hub providing bearing for said armature, substantially as set forth.

17. In a scale, the combination with a beam, a poise, a feed screw engaging the poise, an electric motor, a magnetic clutch connected to the shaft of the motor, an armature having a limited range of lost mot-ion and adapted to effect clutching en-. gagement between the magnetic clutch and the screw when themotor is energized, and means controlling the operation of the m0- tor subject to the movement of the beam.-

18. In a scale, thecombination with a beamhaving a pivotally mounted contact terminal member, of a poise, a feediscrew an electric motor, a shaft for the motor, a magnetic clutch interposed between the shaftiof the motor and the screwfor operatively connecting the two, and means for controlling the operation of the motor havin contact terminals adapted to be engage by the pivoted contact terminal member of the beam.

19. lhe combination with a scale beam, its poise and poise screw, an electric motor for actuating the poise screw, contact mechanism, and connections thereto or establishing current to the motor, of a magnetic clutch embodying lost'motion means 100 for connecting the motor with the screw.

20. The combination with a scale beam, its poise and poise screw, an electric motor .for actuating the poise screw, contact mechanism and connections thereto for estab- 05 lishing current to the-motor, of a magnetic clutch embodying initially inoperative clutch mechanism for connecting the motor with the screw. I

21. A scale beam having a poise and feed 1o screw therefor, an electric motor for actuating the feed screw, a magnet interposed directly between the motor and the feed screw for coupling the two together, and means embodying fined and pivoted contact terminals at the tilting end of the beam for controlling the motor and clutch dependent on the osition of the beam.

22. The combination of a scale beam, a

an electric motor for actuating the feed screw, a magnetic clutch interposed directly between the motor and the feed screw for coupling the two together, printing mechanism controlled by the screw, and contact mechanism embodying fixed contact terminals and a pivoted bar having terminals adapted to engage said terminals, and circuit connections for controlling the shaft, l operation of the motor and clutch dependent on the position of the beam.

The combination of a. poise beam, 21 the operation of the motor and clutch defeed screw :1 poise, an electric motor, a mag; pendent on the position of the beam. 10 net'ic clutch interposed directly between the In testimony whereof I hereunto affix my motor and the feed screw, a limiting houssignature in the presence of two Witnesses.

5 ing for the end of the beam provided. with EDVV-ARD MCGARVEY.

per and 1OW81' contact devices, a pivotall y I Witnesses: .ounted contact carrier on the beam, and M. CLARKE, circuit connections therefrom controlling FREDK. STAUB. 

